update in basic_2

[helm.git] / matita / matita / contribs / lambdadelta / basic_2 / rt_computation / fsb.ma

diff --git a/matita/matita/contribs/lambdadelta/basic_2/rt_computation/fsb.ma b/matita/matita/contribs/lambdadelta/basic_2/rt_computation/fsb.ma
index e5a0108c3383bcfb0da418c525187851c034af1b..72c73ae87ea0fe4b55be75eb276178d9cfcc40de 100644 (file)
--- a/matita/matita/contribs/lambdadelta/basic_2/rt_computation/fsb.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/rt_computation/fsb.ma
@@ -19,7 +19,7 @@ include "basic_2/rt_transition/fpb.ma".
 
 inductive fsb (h): relation3 genv lenv term ≝
 | fsb_intro: ∀G1,L1,T1. (
-                ∀G2,L2,T2. ⦃G1,L1,T1⦄ ≻[h] ⦃G2,L2,T2⦄ → fsb h G2 L2 T2
+               ∀G2,L2,T2. ❪G1,L1,T1❫ ≻[h] ❪G2,L2,T2❫ → fsb h G2 L2 T2
              ) → fsb h G1 L1 T1
 .
 
@@ -30,13 +30,13 @@ interpretation
 (* Basic eliminators ********************************************************)
 
 (* Note: eliminator with shorter ground hypothesis *)
-(* Note: to be named fsb_ind when fsb becomes a definition like csx, lfsx ***)
-lemma fsb_ind_alt: ∀h. ∀Q: relation3 …. (
-                      ∀G1,L1,T1. ≥[h] 𝐒⦃G1,L1,T1⦄ → (
-                         ∀G2,L2,T2. ⦃G1,L1,T1⦄ ≻[h] ⦃G2,L2,T2⦄ → Q G2 L2 T2
-                      ) → Q G1 L1 T1
-                   ) →
-                   ∀G,L,T. ≥[h] 𝐒⦃G,L,T⦄ →  Q G L T.
+(* Note: to be named fsb_ind when fsb becomes a definition like csx, rsx ****)
+lemma fsb_ind_alt (h) (Q:relation3 …):
+      (∀G1,L1,T1. ≥𝐒[h] ❪G1,L1,T1❫ →
+        (∀G2,L2,T2. ❪G1,L1,T1❫ ≻[h] ❪G2,L2,T2❫ → Q G2 L2 T2) →
+        Q G1 L1 T1
+      ) →
+      ∀G,L,T. ≥𝐒[h] ❪G,L,T❫ → Q G L T.
 #h #Q #IH #G #L #T #H elim H -G -L -T
 /4 width=1 by fsb_intro/
 qed-.